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SURFACE MINING METHODS AND EQUIPMENT J. Yamatomi and S. Okubo University of Tokyo, Japan Keywords: Mining method, surface mining, open pit mining, open cast mining, placer mining, solution mining, leaching, stripping rati o, mining machinery, excavation, cutting, grading, loading, ditching Contents 1. Surface Mining Methods
Gold-bearing mineral have 98 species, 47 kinds of common, direct industrial value about 10 kinds,the form of generally divided into three categories, gold ore (Mountain gold mine, endogenous gold) and gold placer (alluvial, alluvial, beach type, slope deposits type and exogenous gold), and Associated gold (recovery from the non-ferrous minerals )
· Gold cyanidation is a hydrometallurgical technique for extracting gold from low-grade ore by The expansion of gold mining in the Rand of South Africa began to slow plant in the United States to make a commercial success of the cyanide Depending on the ore, it is sometimes further concentrated by froth flotation or
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New gold concentration and chemical extraction techniques all contributed to the recovery of gold quartz mining in California. In 1880, the State Bureau of Mines was established by the California legislature, headed by a mineralogist appointed by the Governor.